Lava

Lava moves across the ground as a pahoehoe flow, Kilauea Volcano, Hawai`i

Lava is the term for magma from the Earth's mantle when it erupts onto the Earth's surface. Lava differs from magma in that it contains less dissolved gases, due to the decreased pressure at the surface. Geologists also use the word to describe the solidified deposits of lava flows and fragments hurled into the air by explosive eruptions (for example, lava bombs or blocks).